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LM2940HS-3.3

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HTC Korea TAEJIN Tech Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-223-3L. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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LM2940HS-3.3

HTC Korea TAEJIN Tech · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-223-3L

LM2940HS-3.3 from HTC Korea TAEJIN Tech, in a SOT-223-3L. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 IN power_in Input voltage pin; the maximum continuous input is 26V, with 60V transients allowed only for less than 100ms at 1% duty cycle or less, and a 0.47µF input capacitor is recommended when the regulator is far from the supply filter.
2 GND power_in Ground pin, which the datasheet says must be connected to the tab (TAB), which is also tied to GND.
3 OUT power_out Regulated 3.3V output rated for up to 1.0A, which requires an output capacitor of at least 22µF placed between OUT and GND for stability.

Key specifications

Parameter Value
Manufacturer HTC Korea TAEJIN Tech
Package SOT-223-3L
Category Power Management (PMIC)
Pins 3

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Input Voltage VIN -20 60 V Note 2 1
Maximum Junction Temperature TJ 150 °C 1
Storage Temperature TSTG -65 150 °C 1
Maximum Operating Input Voltage (Continuous) VIN 26 V 2
Operating Ambient Temperature Range TA -40 85 °C 2
Operating Junction Temperature Range TJ -40 125 °C 2
Output Voltage VOUT -2 2 % 5.0mA ≤ IOUT ≤ 1.0A, (VOUT + 1.0V) ≤ VIN ≤ 26V 5
Output Voltage (second line) VOUT -3 3 % (VOUT + 1.0V) ≤ VIN ≤ 26V 5
Line Regulation LNR 0.06 0.5 % IOUT = 5.0mA, (VOUT + 1.0V) ≤ VIN ≤ 26V 5
Load Regulation LDR 0.2 1 % VIN = VOUT + 5.0V, 5.0mA ≤ IOUT ≤ 1.0A 5
Load Regulation (second line) LDR 1.8 % VIN = VOUT + 5.0V, 5.0mA ≤ IOUT ≤ 1.0A 5
Quiescent Current IQ 0.3 0.4 mA IOUT = 5.0mA 5
Quiescent Current (second line) IQ 0.5 mA IOUT = 5.0mA 5
Quiescent Current IQ 11 16 mA IOUT = 1.0A 5
Quiescent Current (second line) IQ 20 mA IOUT = 1.0A 5
Dropout Voltage VDO 110 150 mV IOUT = 100mA 5
Dropout Voltage (second line) VDO 230 mV IOUT = 100mA 5
Dropout Voltage VDO 400 550 mV IOUT = 1.0A 5
Dropout Voltage (second line) VDO 700 mV IOUT = 1.0A 5
Short Circuit Current ISC 1.5 2.4 A VIN = VOUT(NOM) + 1.0V, VOUT = 0V 5
Output Noise Voltage en 150 µVrms f = 10Hz to 100kHz 5
Ripple Rejection PSRR 60 72 dB f = 120Hz (1.0Vrms), IOUT = 100mA 5
Long Term Stability ∆VOUT/∆t 0.4 % t = 1000 hr 5
Reverse Polarity Transient Input Voltage -35 V ROUT = 100Ω, t ≤ 1ms 5
Thermal Resistance Junction-To-Ambient, SOT-223-3L θJA-SOT-223-3L 137 °C/W No heat sink / No air flow / No adjacent heat source / TA=25°C 8

CAD (KiCad official)

  • Symbol: LM2940HS-3.3
  • Footprint: Package_TO_SOT_SMD:SOT-223-3_TabPin2
  • 3D model: SOT-223-3L (KiCad packages3D, STEP)
  • 3D model files: lm2940hs-3-3-etched.step / lm2940hs-3-3-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lm2940hs-3-3.step / lm2940hs-3-3.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: HTC Korea TAEJIN Tech datasheet (9 pp, sha256 cc075c78c00ff673, retrieved 2026-10-18, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF